Quik Drive Subfloor/Underlayment Screws

Simpson Strong-Tie MTHZ1S (#7 x 1") MTH Wood Underlayment Screw Collated Yellow-Zinc (2500 Pack)

Simpson Strong-Tie QDPROLDHG2 Quik Drive PROLDHG2 Underlayment/Backerboard Attachment

Simpson Strong-Tie MTH114S (#7 x 1-1/4") Strong-Drive MTH Wood Underlayment Screw (Collated) Gray Phosphate (2500 Pack)